3 |
* |
* |
4 |
* Implementation of the Domain-Based Mandatory Access Control. |
* Implementation of the Domain-Based Mandatory Access Control. |
5 |
* |
* |
6 |
* Copyright (C) 2005-2008 NTT DATA CORPORATION |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
7 |
* |
* |
8 |
* Version: 1.6.5-pre 2008/10/07 |
* Version: 1.7.0-pre 2009/07/03 |
9 |
* |
* |
10 |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
11 |
* See README.ccs for ChangeLog. |
* See README.ccs for ChangeLog. |
12 |
* |
* |
13 |
*/ |
*/ |
14 |
|
|
|
#include <linux/ccs_common.h> |
|
|
#include <linux/tomoyo.h> |
|
|
#include <linux/realpath.h> |
|
15 |
#include <linux/net.h> |
#include <linux/net.h> |
16 |
#include <linux/inet.h> |
#include <linux/inet.h> |
17 |
#include <linux/in.h> |
#include <linux/in.h> |
18 |
#include <linux/in6.h> |
#include <linux/in6.h> |
19 |
|
#include <net/ip.h> |
20 |
|
#include <net/ipv6.h> |
21 |
|
#include <net/udp.h> |
22 |
|
#include <linux/ccs_common.h> |
23 |
|
#include <linux/tomoyo.h> |
24 |
|
#include <linux/tomoyo_socket.h> |
25 |
|
|
26 |
|
/* Index numbers for Network Controls. */ |
27 |
|
enum ccs_network_acl_index { |
28 |
|
NETWORK_ACL_UDP_BIND, |
29 |
|
NETWORK_ACL_UDP_CONNECT, |
30 |
|
NETWORK_ACL_TCP_BIND, |
31 |
|
NETWORK_ACL_TCP_LISTEN, |
32 |
|
NETWORK_ACL_TCP_CONNECT, |
33 |
|
NETWORK_ACL_TCP_ACCEPT, |
34 |
|
NETWORK_ACL_RAW_BIND, |
35 |
|
NETWORK_ACL_RAW_CONNECT |
36 |
|
}; |
37 |
|
|
38 |
/** |
/** |
39 |
* audit_network_log - Audit network log. |
* ccs_audit_network_log - Audit network log. |
40 |
* |
* |
41 |
* @r: Pointer to "struct ccs_request_info". |
* @r: Pointer to "struct ccs_request_info". |
42 |
* @operation: The name of operation. |
* @operation: The name of operation. |
46 |
* |
* |
47 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
48 |
*/ |
*/ |
49 |
static int audit_network_log(struct ccs_request_info *r, const char *operation, |
static int ccs_audit_network_log(struct ccs_request_info *r, |
50 |
const char *address, const u16 port, |
const char *operation, const char *address, |
51 |
const bool is_granted) |
const u16 port, const bool is_granted) |
52 |
{ |
{ |
53 |
|
if (!is_granted && ccs_verbose_mode(r->domain)) |
54 |
|
printk(KERN_WARNING "TOMOYO-%s: %s to %s %u denied for %s\n", |
55 |
|
ccs_get_msg(r->mode == 3), operation, address, port, |
56 |
|
ccs_get_last_name(r->domain)); |
57 |
return ccs_write_audit_log(is_granted, r, KEYWORD_ALLOW_NETWORK |
return ccs_write_audit_log(is_granted, r, KEYWORD_ALLOW_NETWORK |
58 |
"%s %s %u\n", operation, address, port); |
"%s %s %u\n", operation, address, port); |
59 |
} |
} |
60 |
|
|
61 |
|
/* The list for "struct ccs_address_group_entry". */ |
62 |
|
LIST_HEAD(ccs_address_group_list); |
63 |
|
|
64 |
/** |
/** |
65 |
* save_ipv6_address - Keep the given IPv6 address on the RAM. |
* ccs_get_address_group - Allocate memory for "struct ccs_address_group_entry". |
|
* |
|
|
* @addr: Pointer to "struct in6_addr". |
|
66 |
* |
* |
67 |
* Returns pointer to "struct in6_addr" on success, NULL otherwise. |
* @group_name: The name of address group. |
68 |
* |
* |
69 |
* The RAM is shared, so NEVER try to modify or kfree() the returned address. |
* Returns pointer to "struct ccs_address_group_entry" on success, |
70 |
|
* NULL otherwise. |
71 |
*/ |
*/ |
72 |
static const struct in6_addr *save_ipv6_address(const struct in6_addr *addr) |
static struct ccs_address_group_entry *ccs_get_address_group(const char * |
73 |
{ |
group_name) |
74 |
static const u8 block_size = 16; |
{ |
75 |
struct addr_list { |
struct ccs_address_group_entry *entry = NULL; |
76 |
/* Workaround for gcc 4.3's bug. */ |
struct ccs_address_group_entry *group; |
77 |
struct in6_addr addr[16]; /* = block_size */ |
const struct ccs_path_info *saved_group_name; |
78 |
struct list1_head list; |
int error = -ENOMEM; |
79 |
u32 in_use_count; |
if (!ccs_is_correct_path(group_name, 0, 0, 0) || |
80 |
}; |
!group_name[0]) |
|
static LIST1_HEAD(address_list); |
|
|
struct addr_list *ptr; |
|
|
static DEFINE_MUTEX(lock); |
|
|
u8 i = block_size; |
|
|
if (!addr) |
|
81 |
return NULL; |
return NULL; |
82 |
mutex_lock(&lock); |
saved_group_name = ccs_get_name(group_name); |
83 |
list1_for_each_entry(ptr, &address_list, list) { |
if (!saved_group_name) |
84 |
for (i = 0; i < ptr->in_use_count; i++) { |
return NULL; |
85 |
if (!memcmp(&ptr->addr[i], addr, sizeof(*addr))) |
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
86 |
goto ok; |
mutex_lock(&ccs_policy_lock); |
87 |
} |
list_for_each_entry_rcu(group, &ccs_address_group_list, list) { |
88 |
if (i < block_size) |
if (saved_group_name != group->group_name) |
89 |
break; |
continue; |
90 |
} |
atomic_inc(&group->users); |
91 |
if (i == block_size) { |
error = 0; |
92 |
ptr = ccs_alloc_element(sizeof(*ptr)); |
break; |
|
if (!ptr) |
|
|
goto ok; |
|
|
list1_add_tail_mb(&ptr->list, &address_list); |
|
|
i = 0; |
|
93 |
} |
} |
94 |
ptr->addr[ptr->in_use_count++] = *addr; |
if (error && ccs_memory_ok(entry, sizeof(*entry))) { |
95 |
ok: |
INIT_LIST_HEAD(&entry->address_group_member_list); |
96 |
mutex_unlock(&lock); |
entry->group_name = saved_group_name; |
97 |
return ptr ? &ptr->addr[i] : NULL; |
saved_group_name = NULL; |
98 |
|
atomic_set(&entry->users, 1); |
99 |
|
list_add_tail_rcu(&entry->list, &ccs_address_group_list); |
100 |
|
group = entry; |
101 |
|
entry = NULL; |
102 |
|
error = 0; |
103 |
|
} |
104 |
|
mutex_unlock(&ccs_policy_lock); |
105 |
|
ccs_put_name(saved_group_name); |
106 |
|
kfree(entry); |
107 |
|
return !error ? group : NULL; |
108 |
} |
} |
109 |
|
|
|
/* The list for "struct address_group_entry". */ |
|
|
static LIST1_HEAD(address_group_list); |
|
|
|
|
110 |
/** |
/** |
111 |
* update_address_group_entry - Update "struct address_group_entry" list. |
* ccs_update_address_group_entry - Update "struct ccs_address_group_entry" list. |
112 |
* |
* |
113 |
* @group_name: The name of address group. |
* @group_name: The name of address group. |
114 |
* @is_ipv6: True if @min_address and @max_address are IPv6 addresses. |
* @is_ipv6: True if @min_address and @max_address are IPv6 addresses. |
118 |
* |
* |
119 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
120 |
*/ |
*/ |
121 |
static int update_address_group_entry(const char *group_name, |
static int ccs_update_address_group_entry(const char *group_name, |
122 |
const bool is_ipv6, |
const bool is_ipv6, |
123 |
const u16 *min_address, |
const u16 *min_address, |
124 |
const u16 *max_address, |
const u16 *max_address, |
125 |
const bool is_delete) |
const bool is_delete) |
126 |
{ |
{ |
127 |
static DEFINE_MUTEX(lock); |
struct ccs_address_group_entry *group; |
128 |
struct address_group_entry *new_group; |
struct ccs_address_group_member *entry = NULL; |
129 |
struct address_group_entry *group; |
struct ccs_address_group_member *member; |
|
struct address_group_member *new_member; |
|
|
struct address_group_member *member; |
|
|
const struct path_info *saved_group_name; |
|
130 |
const struct in6_addr *saved_min_address = NULL; |
const struct in6_addr *saved_min_address = NULL; |
131 |
const struct in6_addr *saved_max_address = NULL; |
const struct in6_addr *saved_max_address = NULL; |
132 |
int error = -ENOMEM; |
int error = is_delete ? -ENOENT : -ENOMEM; |
133 |
bool found = false; |
const u32 min_ipv4_address = ntohl(*(u32 *) min_address); |
134 |
if (!ccs_is_correct_path(group_name, 0, 0, 0, __func__) || |
const u32 max_ipv4_address = ntohl(*(u32 *) max_address); |
135 |
!group_name[0]) |
group = ccs_get_address_group(group_name); |
136 |
return -EINVAL; |
if (!group) |
|
saved_group_name = ccs_save_name(group_name); |
|
|
if (!saved_group_name) |
|
|
return -ENOMEM; |
|
|
if (!is_ipv6) |
|
|
goto not_ipv6; |
|
|
saved_min_address |
|
|
= save_ipv6_address((struct in6_addr *) min_address); |
|
|
saved_max_address |
|
|
= save_ipv6_address((struct in6_addr *) max_address); |
|
|
if (!saved_min_address || !saved_max_address) |
|
137 |
return -ENOMEM; |
return -ENOMEM; |
138 |
not_ipv6: |
if (is_ipv6) { |
139 |
mutex_lock(&lock); |
saved_min_address |
140 |
list1_for_each_entry(group, &address_group_list, list) { |
= ccs_get_ipv6_address((struct in6_addr *) |
141 |
if (saved_group_name != group->group_name) |
min_address); |
142 |
continue; |
saved_max_address |
143 |
list1_for_each_entry(member, &group->address_group_member_list, |
= ccs_get_ipv6_address((struct in6_addr *) |
144 |
list) { |
max_address); |
145 |
if (member->is_ipv6 != is_ipv6) |
if (!saved_min_address || !saved_max_address) |
|
continue; |
|
|
if (is_ipv6) { |
|
|
if (member->min.ipv6 != saved_min_address || |
|
|
member->max.ipv6 != saved_max_address) |
|
|
continue; |
|
|
} else { |
|
|
if (member->min.ipv4 != *(u32 *) min_address || |
|
|
member->max.ipv4 != *(u32 *) max_address) |
|
|
continue; |
|
|
} |
|
|
member->is_deleted = is_delete; |
|
|
error = 0; |
|
146 |
goto out; |
goto out; |
147 |
|
} |
148 |
|
if (!is_delete) |
149 |
|
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
150 |
|
mutex_lock(&ccs_policy_lock); |
151 |
|
list_for_each_entry_rcu(member, &group->address_group_member_list, |
152 |
|
list) { |
153 |
|
if (member->is_ipv6 != is_ipv6) |
154 |
|
continue; |
155 |
|
if (is_ipv6) { |
156 |
|
if (member->min.ipv6 != saved_min_address || |
157 |
|
member->max.ipv6 != saved_max_address) |
158 |
|
continue; |
159 |
|
} else { |
160 |
|
if (member->min.ipv4 != min_ipv4_address || |
161 |
|
member->max.ipv4 != max_ipv4_address) |
162 |
|
continue; |
163 |
} |
} |
164 |
found = true; |
member->is_deleted = is_delete; |
165 |
|
error = 0; |
166 |
break; |
break; |
167 |
} |
} |
168 |
if (is_delete) { |
if (!is_delete && error && ccs_memory_ok(entry, sizeof(*entry))) { |
169 |
error = -ENOENT; |
entry->is_ipv6 = is_ipv6; |
170 |
goto out; |
if (is_ipv6) { |
171 |
} |
entry->min.ipv6 = saved_min_address; |
172 |
if (!found) { |
saved_min_address = NULL; |
173 |
new_group = ccs_alloc_element(sizeof(*new_group)); |
entry->max.ipv6 = saved_max_address; |
174 |
if (!new_group) |
saved_max_address = NULL; |
175 |
goto out; |
} else { |
176 |
INIT_LIST1_HEAD(&new_group->address_group_member_list); |
entry->min.ipv4 = min_ipv4_address; |
177 |
new_group->group_name = saved_group_name; |
entry->max.ipv4 = max_ipv4_address; |
178 |
list1_add_tail_mb(&new_group->list, &address_group_list); |
} |
179 |
group = new_group; |
list_add_tail_rcu(&entry->list, |
180 |
} |
&group->address_group_member_list); |
181 |
new_member = ccs_alloc_element(sizeof(*new_member)); |
entry = NULL; |
182 |
if (!new_member) |
error = 0; |
|
goto out; |
|
|
new_member->is_ipv6 = is_ipv6; |
|
|
if (is_ipv6) { |
|
|
new_member->min.ipv6 = saved_min_address; |
|
|
new_member->max.ipv6 = saved_max_address; |
|
|
} else { |
|
|
new_member->min.ipv4 = *(u32 *) min_address; |
|
|
new_member->max.ipv4 = *(u32 *) max_address; |
|
183 |
} |
} |
184 |
list1_add_tail_mb(&new_member->list, &group->address_group_member_list); |
mutex_unlock(&ccs_policy_lock); |
|
error = 0; |
|
185 |
out: |
out: |
186 |
mutex_unlock(&lock); |
ccs_put_ipv6_address(saved_min_address); |
187 |
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
ccs_put_ipv6_address(saved_max_address); |
188 |
|
ccs_put_address_group(group); |
189 |
return error; |
return error; |
190 |
} |
} |
191 |
|
|
192 |
/** |
/** |
193 |
* parse_ip_address - Parse an IP address. |
* ccs_parse_ip_address - Parse an IP address. |
194 |
* |
* |
195 |
* @address: String to parse. |
* @address: String to parse. |
196 |
* @min: Pointer to store min address. |
* @min: Pointer to store min address. |
198 |
* |
* |
199 |
* Returns 2 if @address is an IPv6, 1 if @address is an IPv4, 0 otherwise. |
* Returns 2 if @address is an IPv6, 1 if @address is an IPv4, 0 otherwise. |
200 |
*/ |
*/ |
201 |
static int parse_ip_address(char *address, u16 *min, u16 *max) |
static int ccs_parse_ip_address(char *address, u16 *min, u16 *max) |
202 |
{ |
{ |
203 |
int count = sscanf(address, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" |
int count = sscanf(address, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" |
204 |
"-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
"-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
220 |
&min[0], &min[1], &min[2], &min[3], |
&min[0], &min[1], &min[2], &min[3], |
221 |
&max[0], &max[1], &max[2], &max[3]); |
&max[0], &max[1], &max[2], &max[3]); |
222 |
if (count == 4 || count == 8) { |
if (count == 4 || count == 8) { |
223 |
u8 *p = (void *) min; |
u32 ip = htonl((((u8) min[0]) << 24) + (((u8) min[1]) << 16) |
224 |
*p++ = min[0]; |
+ (((u8) min[2]) << 8) + (u8) min[3]); |
225 |
*p++ = min[1]; |
memmove(min, &ip, sizeof(ip)); |
226 |
*p++ = min[2]; |
if (count == 8) |
227 |
*p = min[3]; |
ip = htonl((((u8) max[0]) << 24) + (((u8) max[1]) << 16) |
228 |
if (count == 4) |
+ (((u8) max[2]) << 8) + (u8) max[3]); |
229 |
memmove(max, min, sizeof(u16) * 4); |
memmove(max, &ip, sizeof(ip)); |
|
p = (void *) max; |
|
|
*p++ = max[0]; |
|
|
*p++ = max[1]; |
|
|
*p++ = max[2]; |
|
|
*p = max[3]; |
|
230 |
return 1; |
return 1; |
231 |
} |
} |
232 |
return 0; |
return 0; |
233 |
} |
} |
234 |
|
|
235 |
/** |
/** |
236 |
* ccs_write_address_group_policy - Write "struct address_group_entry" list. |
* ccs_write_address_group_policy - Write "struct ccs_address_group_entry" list. |
237 |
* |
* |
238 |
* @data: String to parse. |
* @data: String to parse. |
239 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
242 |
*/ |
*/ |
243 |
int ccs_write_address_group_policy(char *data, const bool is_delete) |
int ccs_write_address_group_policy(char *data, const bool is_delete) |
244 |
{ |
{ |
245 |
|
char *w[2]; |
246 |
bool is_ipv6; |
bool is_ipv6; |
247 |
u16 min_address[8]; |
u16 min_address[8]; |
248 |
u16 max_address[8]; |
u16 max_address[8]; |
249 |
char *cp = strchr(data, ' '); |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[1][0]) |
250 |
if (!cp) |
return -EINVAL; |
251 |
return -EINVAL; |
switch (ccs_parse_ip_address(w[1], min_address, max_address)) { |
|
*cp++ = '\0'; |
|
|
switch (parse_ip_address(cp, min_address, max_address)) { |
|
252 |
case 2: |
case 2: |
253 |
is_ipv6 = true; |
is_ipv6 = true; |
254 |
break; |
break; |
258 |
default: |
default: |
259 |
return -EINVAL; |
return -EINVAL; |
260 |
} |
} |
261 |
return update_address_group_entry(data, is_ipv6, |
return ccs_update_address_group_entry(w[0], is_ipv6, min_address, |
262 |
min_address, max_address, is_delete); |
max_address, is_delete); |
|
} |
|
|
|
|
|
/** |
|
|
* find_or_assign_new_address_group - Create address group. |
|
|
* |
|
|
* @group_name: The name of address group. |
|
|
* |
|
|
* Returns pointer to "struct address_group_entry" on success, NULL otherwise. |
|
|
*/ |
|
|
static struct address_group_entry * |
|
|
find_or_assign_new_address_group(const char *group_name) |
|
|
{ |
|
|
u8 i; |
|
|
struct address_group_entry *group; |
|
|
for (i = 0; i <= 1; i++) { |
|
|
list1_for_each_entry(group, &address_group_list, list) { |
|
|
if (!strcmp(group_name, group->group_name->name)) |
|
|
return group; |
|
|
} |
|
|
if (!i) { |
|
|
const u16 dummy[2] = { 0, 0 }; |
|
|
update_address_group_entry(group_name, false, |
|
|
dummy, dummy, false); |
|
|
update_address_group_entry(group_name, false, |
|
|
dummy, dummy, true); |
|
|
} |
|
|
} |
|
|
return NULL; |
|
263 |
} |
} |
264 |
|
|
265 |
/** |
/** |
266 |
* address_matches_to_group - Check whether the given address matches members of the given address group. |
* ccs_address_matches_group - Check whether the given address matches members of the given address group. |
267 |
* |
* |
268 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
269 |
* @address: An IPv4 or IPv6 address. |
* @address: An IPv4 or IPv6 address. |
270 |
* @group: Pointer to "struct address_group_entry". |
* @group: Pointer to "struct ccs_address_group_entry". |
271 |
* |
* |
272 |
* Returns true if @address matches addresses in @group group, false otherwise. |
* Returns true if @address matches addresses in @group group, false otherwise. |
273 |
|
* |
274 |
|
* Caller holds ccs_read_lock(). |
275 |
*/ |
*/ |
276 |
static bool address_matches_to_group(const bool is_ipv6, const u32 *address, |
static bool ccs_address_matches_group(const bool is_ipv6, const u32 *address, |
277 |
const struct address_group_entry *group) |
const struct ccs_address_group_entry * |
278 |
|
group) |
279 |
{ |
{ |
280 |
struct address_group_member *member; |
struct ccs_address_group_member *member; |
281 |
const u32 ip = ntohl(*address); |
const u32 ip = ntohl(*address); |
282 |
list1_for_each_entry(member, &group->address_group_member_list, list) { |
bool matched = false; |
283 |
|
ccs_check_read_lock(); |
284 |
|
list_for_each_entry_rcu(member, &group->address_group_member_list, |
285 |
|
list) { |
286 |
if (member->is_deleted) |
if (member->is_deleted) |
287 |
continue; |
continue; |
288 |
if (member->is_ipv6) { |
if (member->is_ipv6) { |
289 |
if (is_ipv6 && |
if (is_ipv6 && |
290 |
memcmp(member->min.ipv6, address, 16) <= 0 && |
memcmp(member->min.ipv6, address, 16) <= 0 && |
291 |
memcmp(address, member->max.ipv6, 16) <= 0) |
memcmp(address, member->max.ipv6, 16) <= 0) { |
292 |
return true; |
matched = true; |
293 |
|
break; |
294 |
|
} |
295 |
} else { |
} else { |
296 |
if (!is_ipv6 && |
if (!is_ipv6 && |
297 |
member->min.ipv4 <= ip && ip <= member->max.ipv4) |
member->min.ipv4 <= ip && ip <= member->max.ipv4) { |
298 |
return true; |
matched = true; |
299 |
|
break; |
300 |
|
} |
301 |
} |
} |
302 |
} |
} |
303 |
return false; |
return matched; |
304 |
} |
} |
305 |
|
|
306 |
/** |
/** |
307 |
* ccs_read_address_group_policy - Read "struct address_group_entry" list. |
* ccs_read_address_group_policy - Read "struct ccs_address_group_entry" list. |
308 |
* |
* |
309 |
* @head: Pointer to "struct ccs_io_buffer". |
* @head: Pointer to "struct ccs_io_buffer". |
310 |
* |
* |
311 |
* Returns true on success, false otherwise. |
* Returns true on success, false otherwise. |
312 |
|
* |
313 |
|
* Caller holds ccs_read_lock(). |
314 |
*/ |
*/ |
315 |
bool ccs_read_address_group_policy(struct ccs_io_buffer *head) |
bool ccs_read_address_group_policy(struct ccs_io_buffer *head) |
316 |
{ |
{ |
317 |
struct list1_head *gpos; |
struct list_head *gpos; |
318 |
struct list1_head *mpos; |
struct list_head *mpos; |
319 |
list1_for_each_cookie(gpos, head->read_var1, &address_group_list) { |
bool done = true; |
320 |
struct address_group_entry *group; |
ccs_check_read_lock(); |
321 |
group = list1_entry(gpos, struct address_group_entry, list); |
list_for_each_cookie(gpos, head->read_var1, &ccs_address_group_list) { |
322 |
list1_for_each_cookie(mpos, head->read_var2, |
struct ccs_address_group_entry *group; |
323 |
&group->address_group_member_list) { |
group = list_entry(gpos, struct ccs_address_group_entry, list); |
324 |
|
list_for_each_cookie(mpos, head->read_var2, |
325 |
|
&group->address_group_member_list) { |
326 |
char buf[128]; |
char buf[128]; |
327 |
struct address_group_member *member; |
struct ccs_address_group_member *member; |
328 |
member = list1_entry(mpos, struct address_group_member, |
member = list_entry(mpos, |
329 |
|
struct ccs_address_group_member, |
330 |
list); |
list); |
331 |
if (member->is_deleted) |
if (member->is_deleted) |
332 |
continue; |
continue; |
338 |
ccs_print_ipv6(buf, sizeof(buf), min_address); |
ccs_print_ipv6(buf, sizeof(buf), min_address); |
339 |
if (min_address != max_address) { |
if (min_address != max_address) { |
340 |
int len; |
int len; |
341 |
char *cp = strchr(buf, '\0'); |
char *cp = buf + strlen(buf); |
342 |
*cp++ = '-'; |
*cp++ = '-'; |
343 |
len = strlen(buf); |
len = strlen(buf); |
344 |
ccs_print_ipv6(cp, sizeof(buf) - len, |
ccs_print_ipv6(cp, sizeof(buf) - len, |
358 |
HIPQUAD(max_address)); |
HIPQUAD(max_address)); |
359 |
} |
} |
360 |
} |
} |
361 |
if (!ccs_io_printf(head, KEYWORD_ADDRESS_GROUP |
done = ccs_io_printf(head, KEYWORD_ADDRESS_GROUP |
362 |
"%s %s\n", group->group_name->name, |
"%s %s\n", group->group_name->name, |
363 |
buf)) |
buf); |
364 |
goto out; |
if (!done) |
365 |
|
break; |
366 |
} |
} |
367 |
|
if (!done) |
368 |
|
break; |
369 |
} |
} |
370 |
return true; |
return done; |
|
out: |
|
|
return false; |
|
371 |
} |
} |
372 |
|
|
373 |
#if !defined(NIP6) |
#if !defined(NIP6) |
434 |
} |
} |
435 |
|
|
436 |
/** |
/** |
437 |
* update_network_entry - Update "struct ip_network_acl_record" list. |
* ccs_update_network_entry - Update "struct ccs_ip_network_acl_record" list. |
438 |
* |
* |
439 |
* @operation: Type of operation. |
* @operation: Type of operation. |
440 |
* @record_type: Type of address. |
* @record_type: Type of address. |
441 |
* @group: Pointer to "struct address_group_entry". May be NULL. |
* @group: Name of group. May be NULL. |
442 |
* @min_address: Start of IPv4 or IPv6 address range. |
* @min_address: Start of IPv4 or IPv6 address range. |
443 |
* @max_address: End of IPv4 or IPv6 address range. |
* @max_address: End of IPv4 or IPv6 address range. |
444 |
* @min_port: Start of port number range. |
* @min_port: Start of port number range. |
445 |
* @max_port: End of port number range. |
* @max_port: End of port number range. |
446 |
* @domain: Pointer to "struct domain_info". |
* @domain: Pointer to "struct ccs_domain_info". |
447 |
* @condition: Pointer to "struct condition_list". May be NULL. |
* @condition: Pointer to "struct ccs_condition". May be NULL. |
448 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
449 |
* |
* |
450 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
451 |
*/ |
*/ |
452 |
static int update_network_entry(const u8 operation, const u8 record_type, |
static int ccs_update_network_entry(const u8 operation, const u8 record_type, |
453 |
const struct address_group_entry *group, |
const char *group_name, |
454 |
const u32 *min_address, const u32 *max_address, |
const u32 *min_address, |
455 |
const u16 min_port, const u16 max_port, |
const u32 *max_address, |
456 |
struct domain_info *domain, |
const u16 min_port, const u16 max_port, |
457 |
const struct condition_list *condition, |
struct ccs_domain_info *domain, |
458 |
const bool is_delete) |
struct ccs_condition *condition, |
459 |
|
const bool is_delete) |
460 |
{ |
{ |
461 |
struct acl_info *ptr; |
struct ccs_ip_network_acl_record *entry = NULL; |
462 |
struct ip_network_acl_record *acl; |
struct ccs_acl_info *ptr; |
463 |
int error = -ENOMEM; |
int error = is_delete ? -ENOENT : -ENOMEM; |
464 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
/* using host byte order to allow u32 comparison than memcmp().*/ |
465 |
const u32 min_ip = ntohl(*min_address); |
const u32 min_ip = ntohl(*min_address); |
466 |
const u32 max_ip = ntohl(*max_address); |
const u32 max_ip = ntohl(*max_address); |
467 |
const struct in6_addr *saved_min_address = NULL; |
const struct in6_addr *saved_min_address = NULL; |
468 |
const struct in6_addr *saved_max_address = NULL; |
const struct in6_addr *saved_max_address = NULL; |
469 |
|
struct ccs_address_group_entry *group = NULL; |
470 |
if (!domain) |
if (!domain) |
471 |
return -EINVAL; |
return -EINVAL; |
472 |
if (record_type != IP_RECORD_TYPE_IPv6) |
if (group_name) { |
473 |
goto not_ipv6; |
group = ccs_get_address_group(group_name); |
474 |
saved_min_address = save_ipv6_address((struct in6_addr *) min_address); |
if (!group) |
475 |
saved_max_address = save_ipv6_address((struct in6_addr *) max_address); |
return -ENOMEM; |
476 |
if (!saved_min_address || !saved_max_address) |
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
477 |
return -ENOMEM; |
saved_min_address = ccs_get_ipv6_address((struct in6_addr *) |
478 |
not_ipv6: |
min_address); |
479 |
mutex_lock(&domain_acl_lock); |
saved_max_address = ccs_get_ipv6_address((struct in6_addr *) |
480 |
|
max_address); |
481 |
|
if (!saved_min_address || !saved_max_address) |
482 |
|
goto out; |
483 |
|
} |
484 |
if (is_delete) |
if (is_delete) |
485 |
goto delete; |
goto delete; |
486 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
487 |
|
mutex_lock(&ccs_policy_lock); |
488 |
|
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
489 |
|
struct ccs_ip_network_acl_record *acl; |
490 |
if (ccs_acl_type1(ptr) != TYPE_IP_NETWORK_ACL) |
if (ccs_acl_type1(ptr) != TYPE_IP_NETWORK_ACL) |
491 |
continue; |
continue; |
492 |
if (ccs_get_condition_part(ptr) != condition) |
if (ptr->cond != condition) |
493 |
continue; |
continue; |
494 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
acl = container_of(ptr, struct ccs_ip_network_acl_record, head); |
495 |
if (acl->operation_type != operation || |
if (acl->operation_type != operation || |
496 |
acl->record_type != record_type || |
acl->record_type != record_type || |
497 |
acl->min_port != min_port || max_port != acl->max_port) |
acl->min_port != min_port || max_port != acl->max_port) |
509 |
continue; |
continue; |
510 |
} |
} |
511 |
error = ccs_add_domain_acl(NULL, ptr); |
error = ccs_add_domain_acl(NULL, ptr); |
512 |
goto out; |
break; |
513 |
} |
} |
514 |
/* Not found. Append it to the tail. */ |
if (error && ccs_memory_ok(entry, sizeof(*entry))) { |
515 |
acl = ccs_alloc_acl_element(TYPE_IP_NETWORK_ACL, condition); |
entry->head.type = TYPE_IP_NETWORK_ACL; |
516 |
if (!acl) |
entry->head.cond = condition; |
517 |
goto out; |
entry->operation_type = operation; |
518 |
acl->operation_type = operation; |
entry->record_type = record_type; |
519 |
acl->record_type = record_type; |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
520 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
entry->u.group = group; |
521 |
acl->u.group = group; |
group = NULL; |
522 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
523 |
acl->u.ipv4.min = min_ip; |
entry->u.ipv4.min = min_ip; |
524 |
acl->u.ipv4.max = max_ip; |
entry->u.ipv4.max = max_ip; |
525 |
} else { |
} else { |
526 |
acl->u.ipv6.min = saved_min_address; |
entry->u.ipv6.min = saved_min_address; |
527 |
acl->u.ipv6.max = saved_max_address; |
saved_min_address = NULL; |
528 |
} |
entry->u.ipv6.max = saved_max_address; |
529 |
acl->min_port = min_port; |
saved_max_address = NULL; |
530 |
acl->max_port = max_port; |
} |
531 |
error = ccs_add_domain_acl(domain, &acl->head); |
entry->min_port = min_port; |
532 |
|
entry->max_port = max_port; |
533 |
|
error = ccs_add_domain_acl(domain, &entry->head); |
534 |
|
entry = NULL; |
535 |
|
} |
536 |
|
mutex_unlock(&ccs_policy_lock); |
537 |
goto out; |
goto out; |
538 |
delete: |
delete: |
539 |
error = -ENOENT; |
mutex_lock(&ccs_policy_lock); |
540 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
541 |
|
struct ccs_ip_network_acl_record *acl; |
542 |
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
543 |
continue; |
continue; |
544 |
if (ccs_get_condition_part(ptr) != condition) |
if (ptr->cond != condition) |
545 |
continue; |
continue; |
546 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
acl = container_of(ptr, struct ccs_ip_network_acl_record, head); |
547 |
if (acl->operation_type != operation || |
if (acl->operation_type != operation || |
548 |
acl->record_type != record_type || |
acl->record_type != record_type || |
549 |
acl->min_port != min_port || max_port != acl->max_port) |
acl->min_port != min_port || max_port != acl->max_port) |
563 |
error = ccs_del_domain_acl(ptr); |
error = ccs_del_domain_acl(ptr); |
564 |
break; |
break; |
565 |
} |
} |
566 |
|
mutex_unlock(&ccs_policy_lock); |
567 |
out: |
out: |
568 |
mutex_unlock(&domain_acl_lock); |
ccs_put_ipv6_address(saved_min_address); |
569 |
|
ccs_put_ipv6_address(saved_max_address); |
570 |
|
ccs_put_address_group(group); |
571 |
|
kfree(entry); |
572 |
return error; |
return error; |
573 |
} |
} |
574 |
|
|
575 |
/** |
/** |
576 |
* check_network_entry - Check permission for network operation. |
* ccs_check_network_entry2 - Check permission for network operation. |
577 |
* |
* |
578 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
579 |
* @operation: Type of operation. |
* @operation: Type of operation. |
581 |
* @port: Port number. |
* @port: Port number. |
582 |
* |
* |
583 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
584 |
|
* |
585 |
|
* Caller holds ccs_read_lock(). |
586 |
*/ |
*/ |
587 |
static int check_network_entry(const bool is_ipv6, const u8 operation, |
static int ccs_check_network_entry2(const bool is_ipv6, const u8 operation, |
588 |
const u32 *address, const u16 port) |
const u32 *address, const u16 port) |
589 |
{ |
{ |
590 |
struct ccs_request_info r; |
struct ccs_request_info r; |
591 |
struct acl_info *ptr; |
struct ccs_acl_info *ptr; |
592 |
const char *keyword = ccs_net2keyword(operation); |
const char *keyword = ccs_net2keyword(operation); |
593 |
bool is_enforce; |
bool is_enforce; |
594 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
/* using host byte order to allow u32 comparison than memcmp().*/ |
595 |
const u32 ip = ntohl(*address); |
const u32 ip = ntohl(*address); |
596 |
bool found = false; |
bool found = false; |
597 |
char buf[64]; |
char buf[64]; |
598 |
|
ccs_check_read_lock(); |
599 |
if (!ccs_can_sleep()) |
if (!ccs_can_sleep()) |
600 |
return 0; |
return 0; |
601 |
ccs_init_request_info(&r, NULL, CCS_TOMOYO_MAC_FOR_NETWORK); |
ccs_init_request_info(&r, NULL, CCS_MAC_FOR_NETWORK); |
602 |
is_enforce = (r.mode == 3); |
is_enforce = (r.mode == 3); |
603 |
if (!r.mode) |
if (!r.mode) |
604 |
return 0; |
return 0; |
605 |
retry: |
retry: |
606 |
list1_for_each_entry(ptr, &r.domain->acl_info_list, list) { |
list_for_each_entry_rcu(ptr, &r.domain->acl_info_list, list) { |
607 |
struct ip_network_acl_record *acl; |
struct ccs_ip_network_acl_record *acl; |
608 |
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
609 |
continue; |
continue; |
610 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
acl = container_of(ptr, struct ccs_ip_network_acl_record, head); |
611 |
if (acl->operation_type != operation || port < acl->min_port || |
if (acl->operation_type != operation || port < acl->min_port || |
612 |
acl->max_port < port || !ccs_check_condition(&r, ptr)) |
acl->max_port < port || !ccs_check_condition(&r, ptr)) |
613 |
continue; |
continue; |
614 |
if (acl->record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
if (acl->record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
615 |
if (!address_matches_to_group(is_ipv6, address, |
if (!ccs_address_matches_group(is_ipv6, address, |
616 |
acl->u.group)) |
acl->u.group)) |
617 |
continue; |
continue; |
618 |
} else if (acl->record_type == IP_RECORD_TYPE_IPv4) { |
} else if (acl->record_type == IP_RECORD_TYPE_IPv4) { |
619 |
if (is_ipv6 || |
if (is_ipv6 || |
625 |
memcmp(address, acl->u.ipv6.max, 16) > 0) |
memcmp(address, acl->u.ipv6.max, 16) > 0) |
626 |
continue; |
continue; |
627 |
} |
} |
628 |
ccs_update_condition(ptr); |
r.cond = ptr->cond; |
629 |
found = true; |
found = true; |
630 |
break; |
break; |
631 |
} |
} |
635 |
(const struct in6_addr *) address); |
(const struct in6_addr *) address); |
636 |
else |
else |
637 |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
638 |
audit_network_log(&r, keyword, buf, port, found); |
ccs_audit_network_log(&r, keyword, buf, port, found); |
639 |
if (found) |
if (found) |
640 |
return 0; |
return 0; |
|
if (ccs_verbose_mode(r.domain)) |
|
|
printk(KERN_WARNING "TOMOYO-%s: %s to %s %u denied for %s\n", |
|
|
ccs_get_msg(is_enforce), keyword, buf, port, |
|
|
ccs_get_last_name(r.domain)); |
|
641 |
if (is_enforce) { |
if (is_enforce) { |
642 |
int error = ccs_check_supervisor(&r, KEYWORD_ALLOW_NETWORK |
int err = ccs_check_supervisor(&r, KEYWORD_ALLOW_NETWORK |
643 |
"%s %s %u\n", keyword, buf, |
"%s %s %u\n", keyword, buf, |
644 |
port); |
port); |
645 |
if (error == 1) { |
if (err == 1) |
|
r.retry++; |
|
646 |
goto retry; |
goto retry; |
647 |
} |
return err; |
648 |
return error; |
} else if (ccs_domain_quota_ok(&r)) { |
649 |
|
struct ccs_condition *cond = ccs_handler_cond(); |
650 |
|
ccs_update_network_entry(operation, is_ipv6 ? |
651 |
|
IP_RECORD_TYPE_IPv6 : |
652 |
|
IP_RECORD_TYPE_IPv4, |
653 |
|
NULL, address, address, port, port, |
654 |
|
r.domain, cond, false); |
655 |
|
ccs_put_condition(cond); |
656 |
} |
} |
|
if (r.mode == 1 && ccs_check_domain_quota(r.domain)) |
|
|
update_network_entry(operation, is_ipv6 ? |
|
|
IP_RECORD_TYPE_IPv6 : IP_RECORD_TYPE_IPv4, |
|
|
NULL, address, address, port, port, |
|
|
r.domain, NULL, 0); |
|
657 |
return 0; |
return 0; |
658 |
} |
} |
659 |
|
|
660 |
/** |
/** |
661 |
* ccs_write_network_policy - Write "struct ip_network_acl_record" list. |
* ccs_check_network_entry - Check permission for network operation. |
662 |
|
* |
663 |
|
* @is_ipv6: True if @address is an IPv6 address. |
664 |
|
* @operation: Type of operation. |
665 |
|
* @address: An IPv4 or IPv6 address. |
666 |
|
* @port: Port number. |
667 |
|
* |
668 |
|
* Returns 0 on success, negative value otherwise. |
669 |
|
*/ |
670 |
|
static int ccs_check_network_entry(const bool is_ipv6, const u8 operation, |
671 |
|
const u32 *address, const u16 port) |
672 |
|
{ |
673 |
|
const int idx = ccs_read_lock(); |
674 |
|
const int error = ccs_check_network_entry2(is_ipv6, operation, |
675 |
|
address, port); |
676 |
|
ccs_read_unlock(idx); |
677 |
|
return error; |
678 |
|
} |
679 |
|
|
680 |
|
/** |
681 |
|
* ccs_write_network_policy - Write "struct ccs_ip_network_acl_record" list. |
682 |
* |
* |
683 |
* @data: String to parse. |
* @data: String to parse. |
684 |
* @domain: Pointer to "struct domain_info". |
* @domain: Pointer to "struct ccs_domain_info". |
685 |
* @condition: Pointer to "struct condition_list". May be NULL. |
* @condition: Pointer to "struct ccs_condition". May be NULL. |
686 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
687 |
* |
* |
688 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
689 |
*/ |
*/ |
690 |
int ccs_write_network_policy(char *data, struct domain_info *domain, |
int ccs_write_network_policy(char *data, struct ccs_domain_info *domain, |
691 |
const struct condition_list *condition, |
struct ccs_condition *condition, |
692 |
const bool is_delete) |
const bool is_delete) |
693 |
{ |
{ |
694 |
|
char *w[4]; |
695 |
u8 sock_type; |
u8 sock_type; |
696 |
u8 operation; |
u8 operation; |
697 |
u8 record_type; |
u8 record_type; |
698 |
u16 min_address[8]; |
u16 min_address[8]; |
699 |
u16 max_address[8]; |
u16 max_address[8]; |
700 |
struct address_group_entry *group = NULL; |
const char *group_name = NULL; |
701 |
u16 min_port; |
u16 min_port; |
702 |
u16 max_port; |
u16 max_port; |
703 |
u8 count; |
u8 count; |
704 |
char *cp1 = strchr(data, ' '); |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[3][0]) |
705 |
char *cp2; |
return -EINVAL; |
706 |
if (!cp1) |
if (!strcmp(w[0], "TCP")) |
|
goto out; |
|
|
cp1++; |
|
|
if (!strncmp(data, "TCP ", 4)) |
|
707 |
sock_type = SOCK_STREAM; |
sock_type = SOCK_STREAM; |
708 |
else if (!strncmp(data, "UDP ", 4)) |
else if (!strcmp(w[0], "UDP")) |
709 |
sock_type = SOCK_DGRAM; |
sock_type = SOCK_DGRAM; |
710 |
else if (!strncmp(data, "RAW ", 4)) |
else if (!strcmp(w[0], "RAW")) |
711 |
sock_type = SOCK_RAW; |
sock_type = SOCK_RAW; |
712 |
else |
else |
713 |
goto out; |
goto out; |
714 |
cp2 = strchr(cp1, ' '); |
if (!strcmp(w[1], "bind")) |
|
if (!cp2) |
|
|
goto out; |
|
|
cp2++; |
|
|
if (!strncmp(cp1, "bind ", 5)) |
|
715 |
switch (sock_type) { |
switch (sock_type) { |
716 |
case SOCK_STREAM: |
case SOCK_STREAM: |
717 |
operation = NETWORK_ACL_TCP_BIND; |
operation = NETWORK_ACL_TCP_BIND; |
722 |
default: |
default: |
723 |
operation = NETWORK_ACL_RAW_BIND; |
operation = NETWORK_ACL_RAW_BIND; |
724 |
} |
} |
725 |
else if (!strncmp(cp1, "connect ", 8)) |
else if (!strcmp(w[1], "connect")) |
726 |
switch (sock_type) { |
switch (sock_type) { |
727 |
case SOCK_STREAM: |
case SOCK_STREAM: |
728 |
operation = NETWORK_ACL_TCP_CONNECT; |
operation = NETWORK_ACL_TCP_CONNECT; |
733 |
default: |
default: |
734 |
operation = NETWORK_ACL_RAW_CONNECT; |
operation = NETWORK_ACL_RAW_CONNECT; |
735 |
} |
} |
736 |
else if (sock_type == SOCK_STREAM && !strncmp(cp1, "listen ", 7)) |
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "listen")) |
737 |
operation = NETWORK_ACL_TCP_LISTEN; |
operation = NETWORK_ACL_TCP_LISTEN; |
738 |
else if (sock_type == SOCK_STREAM && !strncmp(cp1, "accept ", 7)) |
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "accept")) |
739 |
operation = NETWORK_ACL_TCP_ACCEPT; |
operation = NETWORK_ACL_TCP_ACCEPT; |
740 |
else |
else |
741 |
goto out; |
goto out; |
742 |
cp1 = strchr(cp2, ' '); |
switch (ccs_parse_ip_address(w[2], min_address, max_address)) { |
|
if (!cp1) |
|
|
goto out; |
|
|
*cp1++ = '\0'; |
|
|
switch (parse_ip_address(cp2, min_address, max_address)) { |
|
743 |
case 2: |
case 2: |
744 |
record_type = IP_RECORD_TYPE_IPv6; |
record_type = IP_RECORD_TYPE_IPv6; |
745 |
break; |
break; |
747 |
record_type = IP_RECORD_TYPE_IPv4; |
record_type = IP_RECORD_TYPE_IPv4; |
748 |
break; |
break; |
749 |
default: |
default: |
750 |
if (*cp2 != '@') |
if (w[2][0] != '@') |
751 |
goto out; |
goto out; |
752 |
group = find_or_assign_new_address_group(cp2 + 1); |
group_name = w[2] + 1; |
|
if (!group) |
|
|
return -ENOMEM; |
|
753 |
record_type = IP_RECORD_TYPE_ADDRESS_GROUP; |
record_type = IP_RECORD_TYPE_ADDRESS_GROUP; |
754 |
break; |
break; |
755 |
} |
} |
756 |
if (strchr(cp1, ' ')) |
count = sscanf(w[3], "%hu-%hu", &min_port, &max_port); |
|
goto out; |
|
|
count = sscanf(cp1, "%hu-%hu", &min_port, &max_port); |
|
757 |
if (count != 1 && count != 2) |
if (count != 1 && count != 2) |
758 |
goto out; |
goto out; |
759 |
if (count == 1) |
if (count == 1) |
760 |
max_port = min_port; |
max_port = min_port; |
761 |
return update_network_entry(operation, record_type, group, |
return ccs_update_network_entry(operation, record_type, group_name, |
762 |
(u32 *) min_address, (u32 *) max_address, |
(u32 *) min_address, |
763 |
min_port, max_port, domain, condition, |
(u32 *) max_address, |
764 |
is_delete); |
min_port, max_port, domain, condition, |
765 |
|
is_delete); |
766 |
out: |
out: |
767 |
return -EINVAL; |
return -EINVAL; |
768 |
} |
} |
776 |
* |
* |
777 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
778 |
*/ |
*/ |
779 |
int ccs_check_network_listen_acl(const _Bool is_ipv6, const u8 *address, |
static inline int ccs_check_network_listen_acl(const bool is_ipv6, |
780 |
const u16 port) |
const u8 *address, |
781 |
|
const u16 port) |
782 |
{ |
{ |
783 |
return check_network_entry(is_ipv6, NETWORK_ACL_TCP_LISTEN, |
return ccs_check_network_entry(is_ipv6, NETWORK_ACL_TCP_LISTEN, |
784 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
785 |
} |
} |
786 |
|
|
787 |
/** |
/** |
794 |
* |
* |
795 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
796 |
*/ |
*/ |
797 |
int ccs_check_network_connect_acl(const _Bool is_ipv6, const int sock_type, |
static inline int ccs_check_network_connect_acl(const bool is_ipv6, |
798 |
const u8 *address, const u16 port) |
const int sock_type, |
799 |
|
const u8 *address, |
800 |
|
const u16 port) |
801 |
{ |
{ |
802 |
u8 operation; |
u8 operation; |
803 |
switch (sock_type) { |
switch (sock_type) { |
810 |
default: |
default: |
811 |
operation = NETWORK_ACL_RAW_CONNECT; |
operation = NETWORK_ACL_RAW_CONNECT; |
812 |
} |
} |
813 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
return ccs_check_network_entry(is_ipv6, operation, |
814 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
815 |
} |
} |
816 |
|
|
817 |
/** |
/** |
824 |
* |
* |
825 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
826 |
*/ |
*/ |
827 |
int ccs_check_network_bind_acl(const _Bool is_ipv6, const int sock_type, |
static int ccs_check_network_bind_acl(const bool is_ipv6, const int sock_type, |
828 |
const u8 *address, const u16 port) |
const u8 *address, const u16 port) |
829 |
{ |
{ |
830 |
u8 operation; |
u8 operation; |
831 |
switch (sock_type) { |
switch (sock_type) { |
838 |
default: |
default: |
839 |
operation = NETWORK_ACL_RAW_BIND; |
operation = NETWORK_ACL_RAW_BIND; |
840 |
} |
} |
841 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
return ccs_check_network_entry(is_ipv6, operation, |
842 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
843 |
} |
} |
844 |
|
|
845 |
/** |
/** |
851 |
* |
* |
852 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
853 |
*/ |
*/ |
854 |
int ccs_check_network_accept_acl(const _Bool is_ipv6, const u8 *address, |
static inline int ccs_check_network_accept_acl(const bool is_ipv6, |
855 |
const u16 port) |
const u8 *address, |
856 |
|
const u16 port) |
857 |
{ |
{ |
858 |
int retval; |
int retval; |
859 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
860 |
retval = check_network_entry(is_ipv6, NETWORK_ACL_TCP_ACCEPT, |
retval = ccs_check_network_entry(is_ipv6, NETWORK_ACL_TCP_ACCEPT, |
861 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
862 |
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
863 |
return retval; |
return retval; |
864 |
} |
} |
865 |
|
|
873 |
* |
* |
874 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
875 |
*/ |
*/ |
876 |
int ccs_check_network_sendmsg_acl(const _Bool is_ipv6, const int sock_type, |
static inline int ccs_check_network_sendmsg_acl(const bool is_ipv6, |
877 |
const u8 *address, const u16 port) |
const int sock_type, |
878 |
|
const u8 *address, |
879 |
|
const u16 port) |
880 |
{ |
{ |
881 |
u8 operation; |
u8 operation; |
882 |
if (sock_type == SOCK_DGRAM) |
if (sock_type == SOCK_DGRAM) |
883 |
operation = NETWORK_ACL_UDP_CONNECT; |
operation = NETWORK_ACL_UDP_CONNECT; |
884 |
else |
else |
885 |
operation = NETWORK_ACL_RAW_CONNECT; |
operation = NETWORK_ACL_RAW_CONNECT; |
886 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
return ccs_check_network_entry(is_ipv6, operation, |
887 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
888 |
} |
} |
889 |
|
|
890 |
/** |
/** |
897 |
* |
* |
898 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
899 |
*/ |
*/ |
900 |
int ccs_check_network_recvmsg_acl(const _Bool is_ipv6, const int sock_type, |
static inline int ccs_check_network_recvmsg_acl(const bool is_ipv6, |
901 |
const u8 *address, const u16 port) |
const int sock_type, |
902 |
|
const u8 *address, |
903 |
|
const u16 port) |
904 |
{ |
{ |
905 |
int retval; |
int retval; |
906 |
const u8 operation |
const u8 operation |
907 |
= (sock_type == SOCK_DGRAM) ? |
= (sock_type == SOCK_DGRAM) ? |
908 |
NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT; |
NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT; |
909 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
910 |
retval = check_network_entry(is_ipv6, operation, (const u32 *) address, |
retval = ccs_check_network_entry(is_ipv6, operation, |
911 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
912 |
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
913 |
return retval; |
return retval; |
914 |
} |
} |
915 |
|
|
916 |
|
#define MAX_SOCK_ADDR 128 /* net/socket.c */ |
917 |
|
|
918 |
|
/* Check permission for creating a socket. */ |
919 |
|
int ccs_socket_create_permission(int family, int type, int protocol) |
920 |
|
{ |
921 |
|
int error = 0; |
922 |
|
/* Nothing to do if I am a kernel service. */ |
923 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
924 |
|
return 0; |
925 |
|
if (family == PF_PACKET && !ccs_capable(CCS_USE_PACKET_SOCKET)) |
926 |
|
return -EPERM; |
927 |
|
if (family == PF_ROUTE && !ccs_capable(CCS_USE_ROUTE_SOCKET)) |
928 |
|
return -EPERM; |
929 |
|
if (family != PF_INET && family != PF_INET6) |
930 |
|
return 0; |
931 |
|
switch (type) { |
932 |
|
case SOCK_STREAM: |
933 |
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_CREATE)) |
934 |
|
error = -EPERM; |
935 |
|
break; |
936 |
|
case SOCK_DGRAM: |
937 |
|
if (!ccs_capable(CCS_USE_INET_DGRAM_SOCKET)) |
938 |
|
error = -EPERM; |
939 |
|
break; |
940 |
|
case SOCK_RAW: |
941 |
|
if (!ccs_capable(CCS_USE_INET_RAW_SOCKET)) |
942 |
|
error = -EPERM; |
943 |
|
break; |
944 |
|
} |
945 |
|
return error; |
946 |
|
} |
947 |
|
|
948 |
|
/* Check permission for listening a TCP socket. */ |
949 |
|
int ccs_socket_listen_permission(struct socket *sock) |
950 |
|
{ |
951 |
|
int error = 0; |
952 |
|
char addr[MAX_SOCK_ADDR]; |
953 |
|
int addr_len; |
954 |
|
/* Nothing to do if I am a kernel service. */ |
955 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
956 |
|
return 0; |
957 |
|
if (sock->type != SOCK_STREAM) |
958 |
|
return 0; |
959 |
|
switch (sock->sk->sk_family) { |
960 |
|
case PF_INET: |
961 |
|
case PF_INET6: |
962 |
|
break; |
963 |
|
default: |
964 |
|
return 0; |
965 |
|
} |
966 |
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_LISTEN)) |
967 |
|
return -EPERM; |
968 |
|
if (sock->ops->getname(sock, (struct sockaddr *) addr, &addr_len, 0)) |
969 |
|
return -EPERM; |
970 |
|
switch (((struct sockaddr *) addr)->sa_family) { |
971 |
|
struct sockaddr_in6 *addr6; |
972 |
|
struct sockaddr_in *addr4; |
973 |
|
case AF_INET6: |
974 |
|
addr6 = (struct sockaddr_in6 *) addr; |
975 |
|
error = ccs_check_network_listen_acl(true, |
976 |
|
addr6->sin6_addr.s6_addr, |
977 |
|
addr6->sin6_port); |
978 |
|
break; |
979 |
|
case AF_INET: |
980 |
|
addr4 = (struct sockaddr_in *) addr; |
981 |
|
error = ccs_check_network_listen_acl(false, |
982 |
|
(u8 *) &addr4->sin_addr, |
983 |
|
addr4->sin_port); |
984 |
|
break; |
985 |
|
} |
986 |
|
return error; |
987 |
|
} |
988 |
|
|
989 |
|
/* Check permission for setting the remote IP address/port pair of a socket. */ |
990 |
|
int ccs_socket_connect_permission(struct socket *sock, struct sockaddr *addr, |
991 |
|
int addr_len) |
992 |
|
{ |
993 |
|
int error = 0; |
994 |
|
const unsigned int type = sock->type; |
995 |
|
/* Nothing to do if I am a kernel service. */ |
996 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
997 |
|
return 0; |
998 |
|
switch (type) { |
999 |
|
case SOCK_STREAM: |
1000 |
|
case SOCK_DGRAM: |
1001 |
|
case SOCK_RAW: |
1002 |
|
break; |
1003 |
|
default: |
1004 |
|
return 0; |
1005 |
|
} |
1006 |
|
switch (addr->sa_family) { |
1007 |
|
struct sockaddr_in6 *addr6; |
1008 |
|
struct sockaddr_in *addr4; |
1009 |
|
u16 port; |
1010 |
|
case AF_INET6: |
1011 |
|
if (addr_len < SIN6_LEN_RFC2133) |
1012 |
|
break; |
1013 |
|
addr6 = (struct sockaddr_in6 *) addr; |
1014 |
|
if (type != SOCK_RAW) |
1015 |
|
port = addr6->sin6_port; |
1016 |
|
else |
1017 |
|
port = htons(sock->sk->sk_protocol); |
1018 |
|
error = ccs_check_network_connect_acl(true, type, |
1019 |
|
addr6->sin6_addr.s6_addr, |
1020 |
|
port); |
1021 |
|
break; |
1022 |
|
case AF_INET: |
1023 |
|
if (addr_len < sizeof(struct sockaddr_in)) |
1024 |
|
break; |
1025 |
|
addr4 = (struct sockaddr_in *) addr; |
1026 |
|
if (type != SOCK_RAW) |
1027 |
|
port = addr4->sin_port; |
1028 |
|
else |
1029 |
|
port = htons(sock->sk->sk_protocol); |
1030 |
|
error = ccs_check_network_connect_acl(false, type, |
1031 |
|
(u8 *) &addr4->sin_addr, |
1032 |
|
port); |
1033 |
|
break; |
1034 |
|
} |
1035 |
|
if (type != SOCK_STREAM) |
1036 |
|
return error; |
1037 |
|
switch (sock->sk->sk_family) { |
1038 |
|
case PF_INET: |
1039 |
|
case PF_INET6: |
1040 |
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_CONNECT)) |
1041 |
|
error = -EPERM; |
1042 |
|
break; |
1043 |
|
} |
1044 |
|
return error; |
1045 |
|
} |
1046 |
|
|
1047 |
|
/* Check permission for setting the local IP address/port pair of a socket. */ |
1048 |
|
int ccs_socket_bind_permission(struct socket *sock, struct sockaddr *addr, |
1049 |
|
int addr_len) |
1050 |
|
{ |
1051 |
|
int error = 0; |
1052 |
|
const unsigned int type = sock->type; |
1053 |
|
/* Nothing to do if I am a kernel service. */ |
1054 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
1055 |
|
return 0; |
1056 |
|
switch (type) { |
1057 |
|
case SOCK_STREAM: |
1058 |
|
case SOCK_DGRAM: |
1059 |
|
case SOCK_RAW: |
1060 |
|
break; |
1061 |
|
default: |
1062 |
|
return 0; |
1063 |
|
} |
1064 |
|
switch (addr->sa_family) { |
1065 |
|
struct sockaddr_in6 *addr6; |
1066 |
|
struct sockaddr_in *addr4; |
1067 |
|
u16 port; |
1068 |
|
case AF_INET6: |
1069 |
|
if (addr_len < SIN6_LEN_RFC2133) |
1070 |
|
break; |
1071 |
|
addr6 = (struct sockaddr_in6 *) addr; |
1072 |
|
if (type != SOCK_RAW) |
1073 |
|
port = addr6->sin6_port; |
1074 |
|
else |
1075 |
|
port = htons(sock->sk->sk_protocol); |
1076 |
|
error = ccs_check_network_bind_acl(true, type, |
1077 |
|
addr6->sin6_addr.s6_addr, |
1078 |
|
port); |
1079 |
|
break; |
1080 |
|
case AF_INET: |
1081 |
|
if (addr_len < sizeof(struct sockaddr_in)) |
1082 |
|
break; |
1083 |
|
addr4 = (struct sockaddr_in *) addr; |
1084 |
|
if (type != SOCK_RAW) |
1085 |
|
port = addr4->sin_port; |
1086 |
|
else |
1087 |
|
port = htons(sock->sk->sk_protocol); |
1088 |
|
error = ccs_check_network_bind_acl(false, type, |
1089 |
|
(u8 *) &addr4->sin_addr, |
1090 |
|
port); |
1091 |
|
break; |
1092 |
|
} |
1093 |
|
return error; |
1094 |
|
} |
1095 |
|
|
1096 |
|
/* |
1097 |
|
* Check permission for accepting a TCP socket. |
1098 |
|
* |
1099 |
|
* Currently, the LSM hook for this purpose is not provided. |
1100 |
|
*/ |
1101 |
|
int ccs_socket_accept_permission(struct socket *sock, struct sockaddr *addr) |
1102 |
|
{ |
1103 |
|
int error = 0; |
1104 |
|
int addr_len; |
1105 |
|
/* Nothing to do if I am a kernel service. */ |
1106 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
1107 |
|
return 0; |
1108 |
|
switch (sock->sk->sk_family) { |
1109 |
|
case PF_INET: |
1110 |
|
case PF_INET6: |
1111 |
|
break; |
1112 |
|
default: |
1113 |
|
return 0; |
1114 |
|
} |
1115 |
|
error = sock->ops->getname(sock, addr, &addr_len, 2); |
1116 |
|
if (error) |
1117 |
|
return error; |
1118 |
|
switch (addr->sa_family) { |
1119 |
|
struct sockaddr_in6 *addr6; |
1120 |
|
struct sockaddr_in *addr4; |
1121 |
|
case AF_INET6: |
1122 |
|
addr6 = (struct sockaddr_in6 *) addr; |
1123 |
|
error = ccs_check_network_accept_acl(true, |
1124 |
|
addr6->sin6_addr.s6_addr, |
1125 |
|
addr6->sin6_port); |
1126 |
|
break; |
1127 |
|
case AF_INET: |
1128 |
|
addr4 = (struct sockaddr_in *) addr; |
1129 |
|
error = ccs_check_network_accept_acl(false, |
1130 |
|
(u8 *) &addr4->sin_addr, |
1131 |
|
addr4->sin_port); |
1132 |
|
break; |
1133 |
|
} |
1134 |
|
return error; |
1135 |
|
} |
1136 |
|
|
1137 |
|
/* Check permission for sending a datagram via a UDP or RAW socket. */ |
1138 |
|
int ccs_socket_sendmsg_permission(struct socket *sock, struct sockaddr *addr, |
1139 |
|
int addr_len) |
1140 |
|
{ |
1141 |
|
int error = 0; |
1142 |
|
const int type = sock->type; |
1143 |
|
/* Nothing to do if I am a kernel service. */ |
1144 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
1145 |
|
return 0; |
1146 |
|
if (!addr || (type != SOCK_DGRAM && type != SOCK_RAW)) |
1147 |
|
return 0; |
1148 |
|
switch (addr->sa_family) { |
1149 |
|
struct sockaddr_in6 *addr6; |
1150 |
|
struct sockaddr_in *addr4; |
1151 |
|
u16 port; |
1152 |
|
case AF_INET6: |
1153 |
|
if (addr_len < SIN6_LEN_RFC2133) |
1154 |
|
break; |
1155 |
|
addr6 = (struct sockaddr_in6 *) addr; |
1156 |
|
if (type == SOCK_DGRAM) |
1157 |
|
port = addr6->sin6_port; |
1158 |
|
else |
1159 |
|
port = htons(sock->sk->sk_protocol); |
1160 |
|
error = ccs_check_network_sendmsg_acl(true, type, |
1161 |
|
addr6->sin6_addr.s6_addr, |
1162 |
|
port); |
1163 |
|
break; |
1164 |
|
case AF_INET: |
1165 |
|
if (addr_len < sizeof(struct sockaddr_in)) |
1166 |
|
break; |
1167 |
|
addr4 = (struct sockaddr_in *) addr; |
1168 |
|
if (type == SOCK_DGRAM) |
1169 |
|
port = addr4->sin_port; |
1170 |
|
else |
1171 |
|
port = htons(sock->sk->sk_protocol); |
1172 |
|
error = ccs_check_network_sendmsg_acl(false, type, |
1173 |
|
(u8 *) &addr4->sin_addr, |
1174 |
|
port); |
1175 |
|
break; |
1176 |
|
} |
1177 |
|
return error; |
1178 |
|
} |
1179 |
|
|
1180 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) |
1181 |
|
#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 |
1182 |
|
|
1183 |
|
static inline struct iphdr *ip_hdr(const struct sk_buff *skb) |
1184 |
|
{ |
1185 |
|
return skb->nh.iph; |
1186 |
|
} |
1187 |
|
|
1188 |
|
static inline struct udphdr *udp_hdr(const struct sk_buff *skb) |
1189 |
|
{ |
1190 |
|
return skb->h.uh; |
1191 |
|
} |
1192 |
|
|
1193 |
|
static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
1194 |
|
{ |
1195 |
|
return skb->nh.ipv6h; |
1196 |
|
} |
1197 |
|
|
1198 |
|
#endif |
1199 |
|
#endif |
1200 |
|
|
1201 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 12) |
1202 |
|
static void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, |
1203 |
|
unsigned int flags) |
1204 |
|
{ |
1205 |
|
/* Clear queue. */ |
1206 |
|
if (flags & MSG_PEEK) { |
1207 |
|
int clear = 0; |
1208 |
|
spin_lock_irq(&sk->sk_receive_queue.lock); |
1209 |
|
if (skb == skb_peek(&sk->sk_receive_queue)) { |
1210 |
|
__skb_unlink(skb, &sk->sk_receive_queue); |
1211 |
|
clear = 1; |
1212 |
|
} |
1213 |
|
spin_unlock_irq(&sk->sk_receive_queue.lock); |
1214 |
|
if (clear) |
1215 |
|
kfree_skb(skb); |
1216 |
|
} |
1217 |
|
skb_free_datagram(sk, skb); |
1218 |
|
} |
1219 |
|
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16) |
1220 |
|
static void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, |
1221 |
|
unsigned int flags) |
1222 |
|
{ |
1223 |
|
/* Clear queue. */ |
1224 |
|
if (flags & MSG_PEEK) { |
1225 |
|
int clear = 0; |
1226 |
|
spin_lock_bh(&sk->sk_receive_queue.lock); |
1227 |
|
if (skb == skb_peek(&sk->sk_receive_queue)) { |
1228 |
|
__skb_unlink(skb, &sk->sk_receive_queue); |
1229 |
|
clear = 1; |
1230 |
|
} |
1231 |
|
spin_unlock_bh(&sk->sk_receive_queue.lock); |
1232 |
|
if (clear) |
1233 |
|
kfree_skb(skb); |
1234 |
|
} |
1235 |
|
skb_free_datagram(sk, skb); |
1236 |
|
} |
1237 |
|
#endif |
1238 |
|
|
1239 |
|
/* |
1240 |
|
* Check permission for receiving a datagram via a UDP or RAW socket. |
1241 |
|
* |
1242 |
|
* Currently, the LSM hook for this purpose is not provided. |
1243 |
|
*/ |
1244 |
|
int ccs_socket_recvmsg_permission(struct sock *sk, struct sk_buff *skb, |
1245 |
|
const unsigned int flags) |
1246 |
|
{ |
1247 |
|
int error = 0; |
1248 |
|
const unsigned int type = sk->sk_type; |
1249 |
|
if (type != SOCK_DGRAM && type != SOCK_RAW) |
1250 |
|
return 0; |
1251 |
|
/* Nothing to do if I am a kernel service. */ |
1252 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
1253 |
|
return 0; |
1254 |
|
|
1255 |
|
switch (sk->sk_family) { |
1256 |
|
struct in6_addr sin6; |
1257 |
|
struct in_addr sin4; |
1258 |
|
u16 port; |
1259 |
|
case PF_INET6: |
1260 |
|
if (type == SOCK_DGRAM) { /* UDP IPv6 */ |
1261 |
|
if (skb->protocol == htons(ETH_P_IP)) { |
1262 |
|
ipv6_addr_set(&sin6, 0, 0, htonl(0xffff), |
1263 |
|
ip_hdr(skb)->saddr); |
1264 |
|
} else { |
1265 |
|
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
1266 |
|
} |
1267 |
|
port = udp_hdr(skb)->source; |
1268 |
|
} else { /* RAW IPv6 */ |
1269 |
|
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
1270 |
|
port = htons(sk->sk_protocol); |
1271 |
|
} |
1272 |
|
error = ccs_check_network_recvmsg_acl(true, type, |
1273 |
|
(u8 *) &sin6, port); |
1274 |
|
break; |
1275 |
|
case PF_INET: |
1276 |
|
if (type == SOCK_DGRAM) { /* UDP IPv4 */ |
1277 |
|
sin4.s_addr = ip_hdr(skb)->saddr; |
1278 |
|
port = udp_hdr(skb)->source; |
1279 |
|
} else { /* RAW IPv4 */ |
1280 |
|
sin4.s_addr = ip_hdr(skb)->saddr; |
1281 |
|
port = htons(sk->sk_protocol); |
1282 |
|
} |
1283 |
|
error = ccs_check_network_recvmsg_acl(false, type, |
1284 |
|
(u8 *) &sin4, port); |
1285 |
|
break; |
1286 |
|
} |
1287 |
|
if (!error) |
1288 |
|
return 0; |
1289 |
|
/* |
1290 |
|
* Remove from queue if MSG_PEEK is used so that |
1291 |
|
* the head message from unwanted source in receive queue will not |
1292 |
|
* prevent the caller from picking up next message from wanted source |
1293 |
|
* when the caller is using MSG_PEEK flag for picking up. |
1294 |
|
*/ |
1295 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
1296 |
|
if (type == SOCK_DGRAM) |
1297 |
|
lock_sock(sk); |
1298 |
|
#endif |
1299 |
|
skb_kill_datagram(sk, skb, flags); |
1300 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
1301 |
|
if (type == SOCK_DGRAM) |
1302 |
|
release_sock(sk); |
1303 |
|
#endif |
1304 |
|
/* Hope less harmful than -EPERM. */ |
1305 |
|
return -ENOMEM; |
1306 |
|
} |
1307 |
|
EXPORT_SYMBOL(ccs_socket_recvmsg_permission); |